Empires and dynasties

Originally Answered: Why don’t empires exist anymore? The global growth of nationalism made it too expensive to maintain them. And there were powerful anti-imperialist movements. Some socialist or communist.

Politics. In political science, empire-building refers to the tendency of countries and nations to coercively acquire resources, land, and economic influence outside their established borders in order to expand their size, power, and wealth.

The average age of empires, according to a specialist on the subject, the late Sir John Bagot Glubb, is 250 years. After that, empires always die, often slowly but overwhelmingly from overreaching in the search for power. The America of 1776 will reach its 250th year in 2026.

The British Empire

These 5 Powers Were the Greatest Empires of All Time

• Here’s What You Need To Remember: All of these countries were large and militarily powerful. Even America was once an empire when it had colonial possessions.
• Roman Empire.
• Mongol Empire.
• British Empire.
• Soviet Union.
• United States.

The Western Roman Empire officially ended 4 September 476 CE, when Emperor Romulus Augustulus was deposed by the Germanic King Odoacer (though some historians date the end as 480 CE with the death of Julius Nepos).

Battle of Cannae

The Roman Republic was in trouble. It had three major problems. First the Republic needed money to run, second there was a lot of graft and corruption amongst elected officials, and finally crime was running wild throughout Rome.